Anti -drop austral window, sliding sash

The utility model discloses an anti -drop austral window, sliding sash, including the window frame, install the casement in the window frame, the upper end of casement is equipped with at least one assembly pulley, and the inboard that the window frame was put the beams in place is equipped with the slide corresponding with the assembly pulley, and the pulley of assembly pulley pastes in the slip of slide inside wall, the top of assembly pulley is equipped with the T type hook that upwards extends, and the top of slide is equipped with the spout that prevents the T type and catch hold of with a hook out. The utility model discloses be equipped with T type hook at the top of assembly pulley, the top of slide is equipped with the spout that prevents the T type and catch hold of with a hook out, when normal use, the assembly pulley slides in the slide, T type hook removes in the spout, the normal use of T type hook noninterference casement, receive the exogenic action when the casement, the track that leads to the bottom is when droing, because T type hook is in the spout, can't break away from, thereby it can not drop on the spout to make whole casement all hang, when needs reset, it can only to need to reset the pulley of casement bottom and track, the installation is all convenient very with the use.